I realised i lost my key after yum cha with my friend, lucky my car is in my sight area, i doubt someone has stolen it or i just lost it somewhere...

My key has my number plate on it because stupid SC stick on it when i service my car, my fault forget to tear it away....

Anyway,

I need help from experts by answering my question:

1. Can i erase the data of the lost key in my ECU to prevent the key get to start my car?
2. Should i change the whole alarm system just to prevent the key able to open my door? Any other alternatives? Cheaper one?
3. How much is a immobiliser key?
4. Do i need to change the whole immobiliser system?

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Added on May 10, 2008, 5:35 amPs: I drive a Waja CPS :-(

This post has been edited by -YS-: May 10 2008, 05:35 AM